Trouble installing from DVD/USB

PC Setup I want to install Freenas 11.2-U4.1;
AMD athlon 64 x2 5000+ 2.60Ghz
asus m2n-vm dvi moederbord (4*SATA 3Gb/s RAID 0,RAID 1, RAID10,RAID 5 and JBOD)
be quiet voeding
5 gb ddr2 800mhz ram
3 x 500gb hdd
dvd writer
8GB or 16GB USB stick for Freenas


I’m trying to install FreeNAS 11.2-U4.1 via a DVD to a 8 or 16GB usb stick (I’ve tried both. I’ve also tried installing it from an USB stick to an USB stick) . I can get in the first menu of Freenas (the one that after 10 secs...

Trouble installing from DVD/USB